Australian Tyson Dagley in court over Hawaii fatal jet ski crash

Australian tourist Tyson Dagley has pleaded no contest to a charge of negligent homicide over a jet ski crash that killed an American teenager in Hawaii.

Dagley, 20, entered the plea in the Circuit Court in Honolulu, where the judge set his sentencing for September 5.

The lawsuit was filed by the family of the 16-year-old victim, Kristen Fonseca from California, who are also pursuing Aloha Jet Ski, which rented the jet skis involved in the crash on Keehi Lagoon on August 5.

Walter Rodby, Dagley's lawyer, says his client now just wants "the nightmare" to be over.

Investigators claim Dagley was not paying attention and standing on his jet ski when it hit Ms Fonseca's jet ski from behind.

She died the next day from head injuries.

Dagley suffered spinal injuries and a concussion in the crash.

According to Mr Rogby, the decision to plead no contest came after a review of the police report and video footage of the crash, which showed Dagley was not looking ahead.

He may have been distracted by his girlfriend Natasha Ryan, 21, who was taking video and photos prior to the collision.

Ryan allegedly erased the video camera's memory card after the incident and has been charged with hindering Dagley's prosecution.

Dagley spent two weeks in jail until his family posted 100,000 US dollars in bail.

His lawyer has asked that this be taken into consideration during sentencing, but he could face up to a year in jail.

A no contest plea in the US means the defendant admits no guilt but no longer contests the charges.

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